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# How is the current in a parallel resistor? watch

1. 3 resistors are connected in parallel, of resistances 1 ohm, 2 ohms and 5 ohms. The current in the circuit is 5 A. What's the current in the 2 ohm resistor???
2. (Original post by originaltitle)
3 resistors are connected in parallel, of resistances 1 ohm, 2 ohms and 5 ohms. The current in the circuit is 5 A. What's the current in the 2 ohm resistor???
Kirchoff's First Law states that the sum of currents into a junction is equal to the sum of the currents out of a junction.
Moreover it may also be useful to know that p.d. in parallel is constant.
3. (Original post by originaltitle)
3 resistors are connected in parallel, of resistances 1 ohm, 2 ohms and 5 ohms. The current in the circuit is 5 A. What's the current in the 2 ohm resistor???
Kirchhoff's 2nd law tells you that the p.d. across each resistor must be the same. From there Ohm's law gives you the current.

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